I bought two sets of these batteries and a new charger to use with my DSLR and flash. Initially I was impressed with both the quick charge time and long life of the batteries -- until I went to re-charge, at which point one battery in the first set refused to charge. The charger showed a blinking red light and I had to test each battery in the set before I could identify which one was causing the error.

Within two or three more charges, another battery had failed, leaving me with a 25% failure rate in an unacceptably short time period. Now the entire set of batteries refuses to hold a charge for more than fifty to sixty shots. They're basically unusable to me after approximately five total charges. It's extremely disappointing to invest in batteries and a charger and find them to be of such poor quality.

I bought this at discounted price at closing ritz camera store in great lakes crossing in michigan when they about to close last year.I used it and it is working good with more than 1000 shots full power on my sony hvl-f42am flash.Since i shoot much outdoors i only used it for only few times and recharged it 5 times since i bought it and the sixth time red led light flashes indicating to discard the batteries.

Same problem as other users with regard to several cells not taking a charge after initial charge and the red blinking light remains on indefinitely. At least 3 out of 8 I have confirmed have this issue.

These looked and sounded good until they were put to actual use. At first charge they were fine and had decent life. The problem comes with subsequent charges where the unit's red light flashes indicating to replace the battery. 3 out 4 of my batteries "flashed to replace" and they had only been charged once before. I saw another review where the user had the same problem. Buyer beware.

I just got my new eco-batteries last week and used them this weekend to take pictures of my grandchildren! I love the fact that they are priced right, and I feel I'm doing my part to make sure my grandchildren aren't left with a bunck of alkaline batteries disposed on their planet........

Thse batteries are GREAT! I was able to take sooo many pictures with them. I also read that these are more earth friendly which makes me even happier than the loads of pictures I was able to take. No more Duracell or Energizer for me!!

The salesman recommended these for my Quantaray PZ40X II flash unit that I use on a Nikon D-60. The first charge was good, taking a little over an hour for a full charge, and I was impressed with the performance. I was able to take 2-3 shot bursts on my D-60 with the flash firing on each shot. The fourth shot didn't have the flash, but still I was impressed. The time to recharge was okay, between 5 to 10 seconds or so before I could fire off another burst of shots. Overall battery life was good. (Sorry I am not sure how many shots I fired, but it was enough to keep me happy!) So I bought a second set of four batteries.

However, there must be something wrong with the charger. I have been unable to charge any batteries since the first original charge. According to the blinking lights, it is telling me that the first set of four batteries are no longer usable. So I tried to charge my second set, but no luck. It seems like that unless you get the charger set exactly the right way in an outlet, it won't charge properly.

I will be going to see if I can exchange it for a replacement.

I would give these batteries a 4+, but the charger seems to need a lot of work. It does not seem to sit well in the outlets, so I have yet been able to recharge any of my batteries.

[4 of 5 customers found this review helpful]

New technology for todays needs

By Pascalfrom Prevost, Canada on 3/25/2009

Pros:

Almost no shelf discharge, Lightweight, No problem in the cold, Quick Charge, Rugged

With almost no shelf discharge, quick charging, and no decreased performance in the cold, they are perfect for application where you need to have batteries ready anytime anywhere. When you don't know when you will be using batteries but need them to work when needed, these are for you.

Don't buy. I had Nikon Sb 600 flash. I got this batteries and the flash stopped responding. I got another sb600 and just after a few minutes of working it burnt it. There is some kind of problem with voltage or smth. Both times the flash wouldn't take charge any more. With other batteries it worked for years. Beware